PHP method to obtain x rules in aAAAxAAAa-PHP Tutorial-php.cn

PHP method to obtain x rules in aAAAxAAAa

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Release： 2016-07-25 09:01:25

Original

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As for this question, I just made a small modification to my program, and now the answer is out. Can any PHP expert please help me optimize my code structure? Thank you!
Original article: http://www.oschina.net/code/snippet_192190_16605

/**
*
* @author Leng Liuyun
* @param Sina Weibo http://weibo.com/130326007
*/
function getLower($data){
$length = strlen($data)-1;
$str = '';
for ($i =0;$i<$length;$i++){
$flag = true;
if(!isUpper($data[$i])){//The current lower case is true
if($i == 3){
$flag = getFlag($data,$i);
//This is not true if the fourth last one is uppercase
if(isUpper($data[$i+4])){
$flag = false;
}
} else if($i == $length-3){
$flag = getFlag($data,$i);
//This is not true if the first fourth one is uppercase
if(isUpper($data[$i-4] )){
$flag = false;
}
}else if($i>3 && $i<$length-3){
$flag = getFlag($data,$i);
//If before || It is not true if the last fourth one is uppercase
if(isUpper($data[$i+4]) || isUpper($data[$i-4])){
$flag = false;
}
}else {
$flag = false;
}
if($flag){
@$str .= $data[$i];
}
}
}
return $str;
}
//The front of the public current character After three and three
function getFlag($data,$i){
$flag = true;
for($j=$i-3;$j<=$i+3;$j++){
if($ j != $i){
//This is not true if one of them is lowercase
if(!isUpper($data[$j])){
$flag = false;
}
}
}
return $flag;
}
/**
*
* Determine whether it is a capital letter
*/
function isUpper($s){
if(@ord($s) < 97){
return true;
}else{
return false;
}
}
$ res = '';
$handle = fopen("./input.txt",'r');
$d = fread($handle,filesize("./input.txt"));
$res = getlower (str_replace("rn","",$d));
/*while(!feof($handle)){//Line-by-line reading method
$buffer = fgets($handle,4096);
$res .= getlower($buffer);
}*/
echo $res;
fclose($handle);
?>

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